On Jul 6, 11:20am, Bill Studenmund wrote:
}
} Sorry to spam the list with this, but direct communications don't work.

     Then you simply don't communicate with them.  Personally, I have
no time for people who's mailers are in violation of the RFC's;
especially, if it is a misguided attempt to block spam.

}    ----- Transcript of session follows -----
} ... while talking to mail.weird.com.:
} >>> MAIL From:<skippy@macro.stanford.edu> SIZE=2829
} <<< 550 '<skippy@macro.stanford.edu>SIZE=2829' sender address target
} 'macro.stanford.edu' is not a valid e-mail domain (there is no MX record
} for it). 
} 
} ??? What is this poop? Since when do hosts HAVE to have MX records?
} macro.stanford.edu most CERTAINLY has an "A" record. Why isn't that good
} enough?

     It is plenty good enough.  Anybody that says otherwise is full of
it.  This is a severely broken mailer that should be scrapped (more
likely the admin should be scrapped, since this is most likely a
deliberately broken configuration).

}-- End of excerpt from Bill Studenmund